body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #4e79ff, #ff7ae9);
    /* 蓝色到粉色的渐变背景 */
    color: #fff;
    overflow-x: hidden;
}

/* 背景盒子 */
#container {
    width: 100vw;
    height: 100vh;
    /* 一百三十五度 对角线蓝色粉色渐变*/
    background: linear-gradient(135deg, #4e79ff, #ff7ae9);
    transition: background-color 0.3s ease-in-out;
    font-family: Arial, sans-serif;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

/* 背景过渡效果 */
#content {
    transition: transform 0.3s ease-in-out;
}

/* 超链接字体 */
#Welcome {
    color: white;
    /* 过度时长 */
    transition-duration: 2s;
}

#Welcome:hover {
    font-size: 50px;
    color: orangered;
}

/* 删掉超链接的下划线 */
a {
    TEXT-DECORATION: none
}

h1 {
    margin: 0;
    font-size: 36px;
    font-weight: bold;
    color: #fff;
    transition: color 0.5s ease;
}


footer {
    background-color: rgba(0, 0, 0, 0.3);
    /* 半透明黑色背景 */
    padding: 10px 20px;
    text-align: center;
    position: fixed;
    bottom: 0;
    width: 100%;
    transition: background-color 0.5s ease;
}